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Proceedings Paper

A simple method for focal length measurement
Author(s): Hua Ma; Huan Ren; Lin Zhang; Zhengdong Shi; Quan Yuan; Yi Yang
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Paper Abstract

A simple method for focal length measurement based on image processing is demonstrated and discussed. The collimated beam, detector, motorized translation stage and computer make up of this test system. The two spots pass through the tested lens is accepted by detector, which is transferred twice by motorized translation stage. By acquired the difference of two spots by image processing, the focal length of the tested lens can be gained. The error sources in the measurement are analyzed. Then the results of experiment show that the relative error was 0.1%. This method can be used in workshop and labs for its convenience and low cost.

Paper Details

Date Published: 27 September 2016
PDF: 5 pages
Proc. SPIE 9684, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment, 96843R (27 September 2016); doi: 10.1117/12.2245081
Show Author Affiliations
Hua Ma, Chinese Academy of Engineering Physics (China)
Huan Ren, Chinese Academy of Engineering Physics (China)
Lin Zhang, Chinese Academy of Engineering Physics (China)
Zhengdong Shi, Chinese Academy of Engineering Physics (China)
Quan Yuan, Chinese Academy of Engineering Physics (China)
Yi Yang, Chinese Academy of Engineering Physics (China)


Published in SPIE Proceedings Vol. 9684:
8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment
Yudong Zhang; Fan Wu; Ming Xu; Sandy To, Editor(s)

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